Eduardo Fávero Caires, Angelo Rafael Bini, Vanderson Modolon Duart, Kaynnã da Silva Ricardo, Lucas Maurício Alves
{"title":"在免耕大豆生产中联合接种 Azospirillum brasilense 和晚施氮肥","authors":"Eduardo Fávero Caires, Angelo Rafael Bini, Vanderson Modolon Duart, Kaynnã da Silva Ricardo, Lucas Maurício Alves","doi":"10.1002/agj2.21602","DOIUrl":null,"url":null,"abstract":"<p>Soybean [<i>Glycine max</i> (L.) Merr.] is highly efficient in the biological N<sub>2</sub> fixation (BNF) process through the association of bacteria of the genus <i>Bradyrhizobium</i> in the root nodules of the plants. However, there are still doubts about the need to complement soybean N demand through N fertilization in high-yield environments. In addition, the real impact of co-inoculation of soybean with <i>Azospirillum brasilense</i> and <i>Bradyrhizobium</i> spp. is not yet clear in such environments. A field experiment was conducted from 2012 to 2021 with six soybean cropping seasons in a crop rotation scheme with black oat (<i>Avena strigosa</i> Schreb), maize (<i>Zea mays</i> L.), and wheat (<i>Triticum aestivum</i> L.) under no-till (NT) in Southern Brazil. Soybean seeds were co-inoculated with <i>A. brasilense</i> (strains Ab-V5 and Ab-V6) shortly after inoculation with <i>B</i>radyrhizobium <i>japonicum</i>, and different levels of N fertilization were used in top dressing at the start of pod formation (R<sub>3</sub>). Soybean nutritional status and grain yield were not benefited by co-inoculation with <i>A. brasilense</i>. Since the increased inoculum rate of <i>A. brasilense</i> co-inoculated with rhizobia in soybean compromised both N nutrition and grain yield, this practice should not be encouraged. There was no need to complement soybean N demand through N fertilization during the reproductive stage. Soybean achieved grain yields of 5.0–5.7 Mg ha<sup>−1</sup> and, even so, there was no need to complement N demand through N fertilization. The results suggest that soybean N demand in a high-yielding environment under NT could be satisfied exclusively through the optimization of BNF.</p>","PeriodicalId":7522,"journal":{"name":"Agronomy Journal","volume":null,"pages":null},"PeriodicalIF":2.0000,"publicationDate":"2024-05-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Co-inoculation of Azospirillum brasilense and late nitrogen fertilization for no-till soybean production\",\"authors\":\"Eduardo Fávero Caires, Angelo Rafael Bini, Vanderson Modolon Duart, Kaynnã da Silva Ricardo, Lucas Maurício Alves\",\"doi\":\"10.1002/agj2.21602\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<p>Soybean [<i>Glycine max</i> (L.) Merr.] is highly efficient in the biological N<sub>2</sub> fixation (BNF) process through the association of bacteria of the genus <i>Bradyrhizobium</i> in the root nodules of the plants. However, there are still doubts about the need to complement soybean N demand through N fertilization in high-yield environments. In addition, the real impact of co-inoculation of soybean with <i>Azospirillum brasilense</i> and <i>Bradyrhizobium</i> spp. is not yet clear in such environments. A field experiment was conducted from 2012 to 2021 with six soybean cropping seasons in a crop rotation scheme with black oat (<i>Avena strigosa</i> Schreb), maize (<i>Zea mays</i> L.), and wheat (<i>Triticum aestivum</i> L.) under no-till (NT) in Southern Brazil. Soybean seeds were co-inoculated with <i>A. brasilense</i> (strains Ab-V5 and Ab-V6) shortly after inoculation with <i>B</i>radyrhizobium <i>japonicum</i>, and different levels of N fertilization were used in top dressing at the start of pod formation (R<sub>3</sub>). Soybean nutritional status and grain yield were not benefited by co-inoculation with <i>A. brasilense</i>. Since the increased inoculum rate of <i>A. brasilense</i> co-inoculated with rhizobia in soybean compromised both N nutrition and grain yield, this practice should not be encouraged. There was no need to complement soybean N demand through N fertilization during the reproductive stage. Soybean achieved grain yields of 5.0–5.7 Mg ha<sup>−1</sup> and, even so, there was no need to complement N demand through N fertilization. The results suggest that soybean N demand in a high-yielding environment under NT could be satisfied exclusively through the optimization of BNF.</p>\",\"PeriodicalId\":7522,\"journal\":{\"name\":\"Agronomy Journal\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":2.0000,\"publicationDate\":\"2024-05-24\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Agronomy Journal\",\"FirstCategoryId\":\"97\",\"ListUrlMain\":\"https://onlinelibrary.wiley.com/doi/10.1002/agj2.21602\",\"RegionNum\":3,\"RegionCategory\":\"农林科学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q2\",\"JCRName\":\"AGRONOMY\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Agronomy Journal","FirstCategoryId":"97","ListUrlMain":"https://onlinelibrary.wiley.com/doi/10.1002/agj2.21602","RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"AGRONOMY","Score":null,"Total":0}
Co-inoculation of Azospirillum brasilense and late nitrogen fertilization for no-till soybean production
Soybean [Glycine max (L.) Merr.] is highly efficient in the biological N2 fixation (BNF) process through the association of bacteria of the genus Bradyrhizobium in the root nodules of the plants. However, there are still doubts about the need to complement soybean N demand through N fertilization in high-yield environments. In addition, the real impact of co-inoculation of soybean with Azospirillum brasilense and Bradyrhizobium spp. is not yet clear in such environments. A field experiment was conducted from 2012 to 2021 with six soybean cropping seasons in a crop rotation scheme with black oat (Avena strigosa Schreb), maize (Zea mays L.), and wheat (Triticum aestivum L.) under no-till (NT) in Southern Brazil. Soybean seeds were co-inoculated with A. brasilense (strains Ab-V5 and Ab-V6) shortly after inoculation with Bradyrhizobium japonicum, and different levels of N fertilization were used in top dressing at the start of pod formation (R3). Soybean nutritional status and grain yield were not benefited by co-inoculation with A. brasilense. Since the increased inoculum rate of A. brasilense co-inoculated with rhizobia in soybean compromised both N nutrition and grain yield, this practice should not be encouraged. There was no need to complement soybean N demand through N fertilization during the reproductive stage. Soybean achieved grain yields of 5.0–5.7 Mg ha−1 and, even so, there was no need to complement N demand through N fertilization. The results suggest that soybean N demand in a high-yielding environment under NT could be satisfied exclusively through the optimization of BNF.
期刊介绍:
After critical review and approval by the editorial board, AJ publishes articles reporting research findings in soil–plant relationships; crop science; soil science; biometry; crop, soil, pasture, and range management; crop, forage, and pasture production and utilization; turfgrass; agroclimatology; agronomic models; integrated pest management; integrated agricultural systems; and various aspects of entomology, weed science, animal science, plant pathology, and agricultural economics as applied to production agriculture.
Notes are published about apparatus, observations, and experimental techniques. Observations usually are limited to studies and reports of unrepeatable phenomena or other unique circumstances. Review and interpretation papers are also published, subject to standard review. Contributions to the Forum section deal with current agronomic issues and questions in brief, thought-provoking form. Such papers are reviewed by the editor in consultation with the editorial board.